کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1636305 1516964 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of recovery heating rate on shape memory effect in up-quenched Cu-Al-Mn alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Influence of recovery heating rate on shape memory effect in up-quenched Cu-Al-Mn alloy
چکیده انگلیسی
The effect of recovery heating rate on shape memory effect of the up-quenched Cu-8.88Al-10.27Mn (mass fraction, %) alloy was investigated by optical microscopy, electron transmission microscopy (TEM) and electrical resistivity measurement. It is found that the shape recovery rate decreases as the heating rate decreases. It can reach 75% when the heating rate is 20 °C/min, while it is only 8% when the heating rate is 1 °C/min. In situ microstructure observation indicates that the dependence of shape memory effect on recovery heating rate is caused by the stabilization of twinned martensite induced by deformation. The analysis of electrical resistivity shows that the stabilization of twinned martensite may be ascribed to formation of compound defects of vacancies and dislocations at the boundaries of twinned martensite during the slow heating. The compound defects prevent the reverse transformation of twinned martensite.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 24, Issue 10, October 2014, Pages 3196-3200
نویسندگان
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